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I. Basic Information for CVE-2026-34221
Vulnerability Information

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Vulnerability Title
MikroORM has Prototype Pollution in Utils.merge
Source: NVD (National Vulnerability Database)
Vulnerability Description
MikroORM is a TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Prior to versions 6.6.10 and 7.0.6, a prototype pollution vulnerability exists in the Utils.merge helper used internally by MikroORM when merging object structures. The function did not prevent special keys such as __proto__, constructor, or prototype, allowing attacker-controlled input to modify the JavaScript object prototype when merged. This issue has been patched in versions 6.6.10 and 7.0.6.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
MikroORM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MikroORM是MikroORM开源的一个支持多数据库的类型安全对象关系映射框架。 MikroORM 6.6.10之前版本和7.0.6之前版本存在安全漏洞,该漏洞源于Utils.merge辅助函数未阻止特殊键,可能导致原型污染。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
mikro-ormmikro-orm < 6.6.10 -
II. Public POCs for CVE-2026-34221
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III. Intelligence Information for CVE-2026-34221
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